Rope Services Direct manufactures the majority of our round slings in-house due to investments we have made in the latest sling-making technology. The slings are available in a range of widths and safe working loads and lengths from 1 to 12 meters. The standard colour coding format applies to all our round slings in order to easily identify the safe working load of the sling.
- 1 tonne = purple
- 2 tonne = green
- 3 tonne = yellow
- 4 tonne = grey
- 5 tonne = red
- 6 tonne = brown
- 8 tonne = blue
- 10 tonne = orange.
All round slings can be manufactured in 2-3 working days to your precise requirements. All round slings are clearly marked with relevant information. Rope Services Direct can also supply other types of lifting slings, including flat web slings, wire rope slings and chain slings.
About Round Slings
Round slings are ideal for lifting smooth, polished, cylindrical or delicate objects without inflicting any damage; this is due to the soft and flexible nature of these round slings which are made from 100% polyester.
The seamless tubular cover is non-load bearing and acts as a protective cover around the load bearing core. The covers have excellent wear and abrasion resistance over its entirety partly because there are no seams or edges to rub against loads and components, it is often edges and seams which wear out first.
The load bearing inner core is made from continuously wound and twisted polyester yarn hank, this provides great strength and durability. These slings will flatten during use to better grip the load; this will not detract from its safe working load.
As with all lifting slings safe slinging procedures must be followed at all times. The angle of the lift (this is the angle the sling takes from a vertical plane) , hitch type and safe working load should all be taken into consideration the chart below should help to identify the reduction required to the SWL at various angles and with each hitch type.
Safe use of Round slings
- Slings used in a basket hitch must have the load balanced to prevent slippage.
- Slings must always be protected from being cut by sharp edges, protrusions or abrasives
- Determine the weight of the load, which must be within the rated capacity of the sling.
- Slings with fittings used a choker hitch must be of such a length to assure that the choking action is on the webbinb, and never on a fitting.
- The opening fittings must be the proper shape and size to ensure that the fitting will seat correctly in the hook.
- Select sling having suitable characteristics for the type of load, hitch and environment.
- Slings must not be loaded in excess of the rated capacity, taking into account the load angle which effects the rated capacity.
- Slings must not be dragged on floor or abrasive surfaces, NOR be twisted or tied /joined in knots.
- Slings shall not be pulled from under loads if load is resting on sling.
- When lifting in a chemically active environment, make sure sling materials are compatible with each chemical.
- Do not drop slings with metal fittings
- Slings must not be used to pull on constrained loads.
- Slings that appear damaged must be inspected before use
- Never store wet slings, clean with water and dry thoroughly, ALWAYS store in a cool dry dark place.
- Sun/ultraviolet light degrades the strength of slings.
- The sling shall be hitched in a manner providing control of the load.
- Personnel must keep clear of the suspended load, and from between the sling and load, and between sling and crane/hoist hook.
- Personnel must not ride the sling
- Slings should not be used at temperatures above 80⁰c or below 0⁰c
- Do not shock load
- Do not twist or kink legs.
- Place blocks under load before setting down the load, to allow removal of sling if applicable.
- Load applied to hook shall be centred in base of hook.
- During lifting, with or without load personnel should be alert for possible snagging.
- Slings must be long enough so that the rated capacity is adequate when the angle of the legs is taken into account.
- The sling legs shall contain or support the load from the sides above the centre of gravity when using a basket hitch.
SLING ANGLE AND SLING LOAD CHART
The sling angle is the angle measured between a horizontal line and the sling leg or body. This angle is very important and can have a dramatic effect on the rated capacity of the sling. As shown, when this angle decreases the load on each leg increases. This is the principal which applies whether one sling is used to pull at an angle, in a basket hitch, or for multi-legged bridle slings. This data is only for equally loaded sling legs. Sling angles of less than 30 degrees are not recommended.
INSPECTING YOUR ROUNDSLINGS:
INITIAL INSPECTION: Before any new or repaired slings are placed in service they should be inspected by a designated person to ensure that the correct sling is being used as well as to determine that the slings meet the requirements and has not been damaged in shipping.
FREQUENT INSPECTIONS: This inspection shall be carried out by a qualified person handling the sling each time the sling is used.
PERIODIC INSPECTIONS: This inspection shall be carried out by designated personnel, the frequency of inspection should be based on:
Frequency of sling use.
Severity of service conditions.
Experience gained on the service life of slings used in similar applications.
Periodic inspections should be conducted at least 6 monthly and a record kept of inspections.
Slings should always be examined before each use for signs of deterioration including, snagging, holes, tears, cuts, broken or worn stitching, knots, burns or excessive abrasive wear.